Help with eyeglasses places with no insurance

So I'm an international student. I have lost my eyeglasss and don't have my prescription from my home country. Where can I go to make an eye exam and get not expensive eyeglasses? I have made some research in Costco eye exams and they cost around 100$ only the exam. I also research americas best for their promotion of 79.99 2 pairs and free exam, only that I have read it is a scam and you end paying more for it. Any recommendations? I think the maximum I will pay is 300$ since that is actually and approx of what I pay in my home country for 2 frames+crystals prescription+ exam